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Efeito do tratamento térmico sobre as propriedades de painéis OSB
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mendes, Rafael Farinassi |
| Copyright Year | 2011 |
| Abstract | Effect of thermal treatment on OSB panels properties The main objective of this study was to evaluate the effect of thermal treatment of strand particles (pre treatment) and panels (post-treatment) on the physical and mechanical properties of the panels, aiming primarily to improve the dimensional stability. The experimental design was consisted of seven treatments, with the evaluation of: two temperatures of particle treatment (200 and 240 °C) during 60 minutes; thermal post-treatment of the panels produced with and without the application of paraffin at 220 ° C during 12 minutes; and the increase in adhesive content and application of paraffin on the panels without thermal treatment. Three panels were produced for each treatment with nominal density of 0.65 g/cm 3, bonded with phenol-formaldehyde adhesive. The pressing cycle of the panels was as follows: 8minute press time, pressure of 35 kgf/cm 2, and temperature of 160 °C. From the panels produced, specimens were obtained to conduct physical tests (moisture content, bulk density, water absorption and thickness swelling) and mechanical (Modulus of Rupture, Modulus of elasticity and internal bonding), tests according to ASTM D 1037 (2006) and DIN 52 362 (1982) standard. Through the analysis of test results it was possible to conclude: The panels produced with the particles thermally treated at 240°C were superior to the others for all physical properties evaluated, and therefore it was treatment with better dimensional stability. The post-thermal treatment caused a significant improvement of the physical properties of the panels without compromising the mechanical properties. The prethermal treatment had an effect on the properties of the panels that was more pronounced than the post-heat treatment, providing improved physical properties and lower mechanical properties. The increase in adhesive content and the application of paraffin were not as efficient in the dimensional stability of OSB as the thermal treatment applied on the particles at 240 ° C. |
| File Format | PDF HTM / HTML |
| DOI | 10.11606/D.11.2011.tde-11022011-105740 |
| Alternate Webpage(s) | https://teses.usp.br/teses/disponiveis/11/11150/tde-11022011-105740/publico/Rafael_Mendes.pdf |
| Alternate Webpage(s) | https://doi.org/10.11606/D.11.2011.tde-11022011-105740 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
